Dielectrophoretic mobility in the characterization of properties of microparticles

Abstract

The dielectric properties of microparticles were characterized by quadrupole electrode geometry. Quadruple microelectrode geometry with hyperbolic active interfaces was designed and fabricated. The dielectrophoretic mobility coefficients of the polystyrene microparticles were attained from negative dielectrophoresis. With the mobility coefficients and hypothetical inflection frequencies of the particles, the permittivity and electric conductivity of the particles in suspension were calculated. This demonstration established that dielectrophoretic mobility attained with a hyperbolic electrode can be used to characterize microparticle properties in suspension. © Versita Warsaw and Springer-Verlag Berlin Heidelberg.